Allow for more content types for downloads

src/main/java/io/papermc/bibliothek/controller/v2/DownloadController.java

@@ -36,6 +36,7 @@
 import io.papermc.bibliothek.exception.ProjectNotFound;
 import io.papermc.bibliothek.exception.VersionNotFound;
 import io.papermc.bibliothek.util.HTTP;
+import io.papermc.bibliothek.util.MediaTypes;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.headers.Header;
@@ -107,7 +108,7 @@ private DownloadController(
     value = "/v2/projects/{project:[a-z]+}/versions/{version:" + Version.PATTERN + "}/builds/{build:\\d+}/downloads/{download:" + Build.Download.PATTERN + "}",
     produces = {
       MediaType.APPLICATION_JSON_VALUE,
-      HTTP.APPLICATION_JAVA_ARCHIVE_VALUE
+      MediaType.ALL_VALUE
     }
   )
   @Operation(summary = "Downloads the given file from a build's data.")
@@ -161,7 +162,7 @@ private static HttpHeaders headersFor(final Path path, final CacheControl cache)
       final HttpHeaders headers = new HttpHeaders();
       headers.setCacheControl(cache);
       headers.setContentDisposition(HTTP.attachmentDisposition(path.getFileName()));
-      headers.setContentType(HTTP.APPLICATION_JAVA_ARCHIVE);
+      headers.setContentType(MediaTypes.fromFileName(path.getFileName().toString()));
       headers.setLastModified(Files.getLastModifiedTime(path).toInstant());
       return headers;
     }

src/main/java/io/papermc/bibliothek/util/HTTP.java

@@ -28,13 +28,9 @@
 import java.time.Duration;
 import org.springframework.http.CacheControl;
 import org.springframework.http.ContentDisposition;
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 
 public final class HTTP {
-  public static final String APPLICATION_JAVA_ARCHIVE_VALUE = "application/java-archive";
-  public static final MediaType APPLICATION_JAVA_ARCHIVE = new MediaType("application", "java-archive");
-
   private HTTP() {
   }
 

src/main/java/io/papermc/bibliothek/util/MediaTypes.java

@@ -0,0 +1,52 @@
+/*
+ * This file is part of bibliothek, licensed under the MIT License.
+ *
+ * Copyright (c) 2019-2024 PaperMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package io.papermc.bibliothek.util;
+
+import org.jetbrains.annotations.Nullable;
+import org.springframework.http.MediaType;
+import org.springframework.http.MediaTypeFactory;
+
+public final class MediaTypes {
+
+  public static final String APPLICATION_ZIP_VALUE = "application/zip";
+  public static final MediaType APPLICATION_ZIP = MediaType.parseMediaType(APPLICATION_ZIP_VALUE);
+
+  private MediaTypes() {
+  }
+
+  public static @Nullable MediaType fromFileName(final String name) {
+    final int index = name.lastIndexOf('.');
+    if (index != -1) {
+      return fromFileExtension(name.substring(index + 1));
+    }
+    return null;
+  }
+
+  public static @Nullable MediaType fromFileExtension(final String extension) {
+    return switch (extension) {
+      case "mcpack" -> APPLICATION_ZIP;
+      default -> MediaTypeFactory.getMediaType("." + extension).orElse(MediaType.APPLICATION_OCTET_STREAM);
+    };
+  }
+}